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UNITED STATES PATENT OFFICE.

HENRY RIGHT, OF NEW YORK, AND DAVID G. BLACK, OF BROOKLYN, NEW YORK,

ASBIGNORS TO ALLOYS & PRODUCTS, 1110., OF NEW YORK, N. Y., A GORIORA- 'I'ION OI NEW YORK.

ALLOY.

No Drawing. Application filed June 12,

To all whom it may concern Be it known that we, HENRY Hnon'r and DAVID G. BLACK, both citizens of the United States, and both residents of the city of New York, boroughs of Bronx and Brooklyn, respectively, county of New York, and county of Kings, respectively, and State of New York, have invented a new and Improved Alloy, of which the following is a full, clear, and exact description.

This invention relates to alloys, and has reference more particularly to an alloy containing nickel, copper, chromium, and iron, with a trace of aluminum.

An object of this invention is to produce an alloy capable of taking a high polish, having a high tensile strength and elasticity, which is non-corrodible and impervious to the action of cold, dilute, or concentrated acids such as sulfuric, tartaric, citric, oleic, oxalic, formic, and other acids as well as alkalis, sea water, and atmospheric influences.

A further object of this invention is to produce an alloy which has a high melting point, and is capable of withstanding extremely high temperatures.

A still further object of this invention is to produce an alloy which is suitable for machinery and all domestic purposes and appliances, which will resist oxidation, always retaining its color, and will improve in appearance by wear.

Our improved alloy contains metals, each of which has a very high melting point, and which when combined together, will form an alloy which is resistant to extremely high temperatures. The alloy contains- Copper 25 to 40%. Nickel 20 to 40%. Chromium 6 to 12%. Iron 25 to 40%.

For special alloys having a high elasticity and ductility, 1 to 3% of manganese is added.

The alloy is compounded in the usual manner by fusing all ingredients together, and then after fusion is complete, a small quantity of aluminum is preferably but not necessarily added as a dioxidizing agent which remains in the final alloy to the extent of 1} to 2%.

Specification of Letters Patent.

Patented Aug. 30, 1921.

1920. Serial No. 388,589.

We have found that this alloy will withstand an extremely high temperature without fusing, and is not corroded by cold, dilute, or concentrated acids such as sulfuric, tartaric, citric, oleic, oxalic, lformic, and many other acids as well as alkalis, sea water, and all atmospheric influences or conditions. The alloy will take a high polish, Wlll retain its color, will improve in appearance by wear, and has a great tensile stren h and elasticity. The alloy is suitable or use in apparatus in which high temperature is unnecessary, and is especially useful in chemical apparatus in which various chemicals are treated. It is also suitable for machinery and all domestic purposes and appliances.

We would state in conclusion that while the desrg ibed example constitutes a practical embodiment of our invention, we do not limit ourselves precisely to the details described, since manifestly the same can be considerably varied without departing from the spirit of the invention as defined in the appended claims.

Having thus described our invention we claim as new and desire to secure by Letters Patent:

1. An alloy containing copper, 25 to 40 per cent.; nickel, 20 to 40 per cent.; chromium, 6 to 12 per cent.; and iron, 25 to 40 per cent.

2. An alloy containing copper, 25 to 40 per cent.; nickel, 20 to 40 per cent.; chromium, 6 to 12 per cent.; and iron, 25 to 40 per cent.; to which is added 1 to 3 per cent. manganese.

3. An alloy containing copper, 25 to 40 per cent.; nickel, 20 to 40 per cent.; chromium, 6 to 12 per cent.; and iron, 25 to 40 per cent, to which is added a dioxidizing agent in the form of aluminum.

4. An allow comprising copper, 25 to 40 per cent.; nickel, 20 to 40 per cent.; chromium, 6 to 12 per cent.; iron, 25 to 40 per cent, and aluminum, said aluminum serving as a dioxidizing agent and remaining in the alloy to the extent of to 2 per cent.

HENRY HECHT. DAVID G. BLACK. 

